import Vue from 'vue'
import VueRouter from 'vue-router'
import login from '../components/Login'
import Home from '../components/Home'
import welcome from '../components/Welcome'
import users from '../components/user/users'

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: login },
    {
      path: '/home',
      component: Home,
      redirect: '/Welcome',
      children: [{
        path: '/welcome',
        component: welcome
      }, { path: '/users', component: users }]
    }
  ]
})
// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数,表示放行
  // next() 放行  next('./login') 强制跳转

  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})

export default router
